This paper studied the physiological and biochemical characteristics of a new strain of photosynthetic bacteria isolated from soil in details, identified its belonging, and used it to treat artificial soybean wastewater and reclaim resources. Results showed that the strain belonged to Rhodopseudomonas sphaeroides, and was named Z08. For treating wastewater with COD of 8 000-12 000 mg·L^-1 under 26-28 ℃, the optimal dose of PSB was 160-400 mg·L^-1; COD removal reached 85％ after 72 h. Various oxygen-light conditions were examined, and the best one was found to be natural light-micro oxygen condition. Under this condition, COD removal reached 73.5％ and biomass reached 2 125 mg·L^-1 after 72 h treatment. The optimal condition of Z08 treating soybean wastewater was as follows: natural light and micro oxygen condition, Z08 dose of 160-400 mg·L^-1, and hydraulic retention time of 72 h.